Finding the Fourth Proportional to 17,189.16, 23,720.85 and 9,636.72

Step by Step Solution

1. Step 1: Write the proportion equation
   17,189.16 : 23,720.85 = 9,636.72 : x
2. Step 2: Convert to fraction form
   17,189.16/23,720.85 = 9,636.72/x
3. Step 3: Cross multiply
   17,189.16x = 23,720.85 × 9,636.72
4. Step 4: Simplify right side
   17,189.16x = 228,591,189.61
5. Step 5: Solve for x
   x = 228,591,189.61/17,189.16
6. Step 6: Final answer
   x = 13,298.57